A quality that describes a person with
radical thoughts and ideas.
Radical, as in an
extremist, rebellious, and revolutionary kind of way.
It can't really be used in a sentence, because it may not sound right, but hey, it's better than radicalness.
See radical.
The leader rallies up his men with his
mountainous voice, his left fist raised
up high, his own eyes burning with the fires of radicality that
boil forth from within the recesses of his mind, his heart, and his soul.